document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1174983>Question 1174983</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 1. The mean serum cholesterol level in a certain population of normal healthy men<BR>\n" );
document.write( "is 240 mg/dl and the standard deviation is 40 mg/dl. A clinical researcher<BR>\n" );
document.write( "interested in comparing cholesterol levels in this healthy population with those<BR>\n" );
document.write( "in men with coronary artery disease measured serum cholesterol level in a<BR>\n" );
document.write( "random sample of 100men who had undergone coronary bypass surgery during<BR>\n" );
document.write( "the preceding two year period. The mean serum cholesterol level for sampling<BR>\n" );
document.write( "was 260 mg/dl<BR>\n" );
document.write( "A. What is the 95% confidence interval estimate of the mean cholesterol level for<BR>\n" );
document.write( "all men undergoing bypass surgery? Assume that the standard deviation of<BR>\n" );
document.write( "serum cholesterol measurement for this population is the same as that of the<BR>\n" );
document.write( "healthy population ( i.e., 40mg/dl)<BR>\n" );
document.write( "B. Based on this estimate, can the researcher conclude that the mean serum<BR>\n" );
document.write( "cholesterol of men undergoing coronary bypass surgery differs from that of<BR>\n" );
document.write( "healthy men?<BR>\n" );
document.write( "2. Among 200 patients at a Tikur Anbessa hospital.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #800506 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52797)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=800506\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Those who violate the rules, should not get benefits from the forum.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "By the way, the problem #2 is NONSENSICAL,  as I noticed it just many times before.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );